Operating mechanism
By designing the clutch assembly and worm gear reduction gear set, the circuit breaker operating mechanism can be switched between electric and manual modes, solving the problem of requiring a large amount of force for manual operation and achieving a labor-saving effect.
Patent Information
- Application Number
- CN202423294602.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The existing circuit breaker operating mechanism requires overcoming significant spring force and resistance from the deceleration mechanism when operated manually, resulting in inconvenience.
A clutch assembly is used to transmit the torque from the reduction gear set to the main shaft in one direction. Combined with the worm gear and reduction gear set, it enables switching between electric and manual operation and reduces resistance during manual operation.
When operated electrically, torque is transmitted through a reduction gear set; when operated manually, it is labor-saving, compact in structure, small in size, easy to install, and reduces the labor intensity of operators.
Smart Images
Figure CN223665392U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of circuit breaker accessories, in particular to an operating mechanism. BACKGROUND
[0002] The circuit breaker is a key element in the process of power grid output, power transformation and power distribution. When the circuit breaker is working, the circuit can be opened and closed by manual operation, or can be operated by electric operation. The operating mechanism is the core component for realizing the operation of the circuit breaker.
[0003] The operating force of the circuit breaker is generally required to be large, so the electric operating mechanism is generally composed of a motor and a speed reduction mechanism. Thus, the circuit breaker with the electric operating mechanism can realize the functions of electric operation and manual operation.
[0004] However, since the manual operation and the electric operation are both realized by driving the main shaft of the circuit breaker to realize the corresponding functions, in the actual use process, when the manual operation is performed, the operator needs to overcome not only the elastic force of the circuit breaker mechanism itself, but also the resistance of the speed reduction mechanism, so that the operator needs to exert a large force to overcome the resistance of rotation, which greatly affects the convenience of use of the operating mechanism, and there is a deficiency. CONTENT OF THE INVENTION
[0005] In order to improve the problem that the operator needs to exert a large force to manually rotate the operating mechanism, the present application provides an operating mechanism.
[0006] The operating mechanism provided by the present application adopts the following technical scheme:
[0007] The operating mechanism comprises a rack, a driving motor is arranged on the rack, a main shaft and a driving shaft are rotatably arranged on the rack, a speed reduction gear set for transmitting torque is arranged between the output shaft of the driving motor and the driving shaft, a clutch assembly is arranged between the main shaft and the driving shaft, and the clutch assembly is used for unidirectionally transmitting the torque on the speed reduction gear set to the main shaft.
[0008] By adopting the above technical scheme, when the electric operation is adopted, the output shaft of the driving motor transmits the torque to the driving shaft through the speed reduction gear set, and then the clutch assembly transmits the torque on the driving shaft to the main shaft, so as to realize the process that the driving motor drives the rotation of the main shaft. When the manual operation is adopted, the operator rotates the main shaft. Since the clutch assembly can only unidirectionally transmit the torque on the speed reduction gear set to the main shaft, the rotation of the main shaft is not affected by the speed reduction gear set, so as to realize the effect of saving labor.
[0009] Optionally, the speed reduction gear set comprises a driving gear coaxially arranged on the driving shaft and a worm wheel rotatably arranged on the frame, a worm is coaxially arranged on the output shaft of the driving motor and engaged with the worm wheel, and a plurality of speed reduction gears for transmitting torque are rotatably arranged between the driving gear and the worm wheel.
[0010] By adopting the above technical scheme, the driving motor is horizontally arranged on the frame, so as to reduce the volume of the frame.
[0011] Optionally, the clutch assembly comprises an inner ring coaxially and rotatably sleeved on the driving shaft, an outer ring coaxially and rotatably sleeved on the inner ring, a transmission member arranged between the outer ring and the main shaft for transmitting torque, a plurality of clutch protrusions uniformly arranged on the inner side wall of the outer ring in the circumferential direction, the clutch protrusions abutting against the circumferential outer side wall of the inner ring, a plurality of driving protrusions uniformly arranged on the driving shaft in the circumferential direction, the driving protrusions abutting against the circumferential inner side wall of the inner ring, and a rolling groove formed between the inner and outer side walls of the inner ring, wherein a rolling ball is rotatably arranged in the rolling groove, and the rolling ball abuts against the inner side wall of the outer ring when the driving protrusion abuts against the rolling ball.
[0012] By adopting the above technical scheme, when the driving gear drives the driving shaft to rotate, the driving shaft drives the driving protrusions to synchronously rotate, the rotating driving protrusions push the rolling ball, the rolling ball rolls in the rolling groove in the direction away from the driving shaft until the driving protrusions press the rolling ball against the inner side wall of the outer ring, and then the inner ring drives the rolling ball to abut against the clutch protrusions on the outer ring, the outer ring rotates together with the inner ring under the blocking action of the clutch protrusions, and then the transmission member transmits the torque on the outer ring to the main shaft, when the main shaft needs to be manually rotated, the driving motor is first reversed by a certain angle, at this time, the rolling groove is located between the adjacent two driving protrusions by the speed reduction gear set, and then the operator rotates the main shaft, the main shaft drives the outer ring to rotate through the transmission member, the clutch protrusions on the outer ring push the rolling ball to the position between the rolling groove and the adjacent two driving protrusions, and the outer ring can be freely rotated, while the driving shaft does not rotate, so as to save the effort.
[0013] Optionally, the distance between the circumferential outer side wall of the driving shaft and the circumferential outer side wall of the inner ring is greater than the diameter of the rolling ball, and the diameter of the inner ring of the inner ring is less than the diameter of the rolling ball.
[0014] By adopting the above technical scheme, when manually operated, the outer ring can push the rolling ball to the position communicated between the rolling groove and the adjacent two driving protrusions, so as to reduce the influence of the rolling ball on the manual operation.
[0015] Optionally, the transmission member comprises a mounting column coaxially inserted into the inner ring of the outer ring, and a driving gear coaxial with the outer ring is arranged on the mounting column, and a transmission gear is arranged on the main shaft and meshes with the driving gear.
[0016] By adopting the above technical scheme, the installation position of the main shaft can be reasonably planned, the structure is more compact, the volume is reduced, the mounting column is convenient for assembly, and the possibility of accidental sliding of the ball is reduced.
[0017] Optionally, a ring groove is coaxially arranged on the inner ring, a damping clamp with a U-shaped cross section is clamped on the ring groove, a support column is arranged on the rack, the support column is located between the two ends of the U-shaped damping clamp, and the damping clamp is used to abut against the support column.
[0018] By adopting the above technical scheme, when the operator manually rotates the main shaft, the damping clamp prevents the inner ring from rotating with the outer ring through the friction force of the ring groove and the limiting action of the support column, and the clutching protrusion on the outer ring pushes the ball to the position between the rolling groove and the adjacent two driving protrusions, thereby saving the operator's effort, and the ring groove design enables the driving motor to easily overcome the resistance of the damping clamp.
[0019] Optionally, a limiting column is arranged on the transmission gear, the axis of the limiting column is parallel to the axis of the main shaft, an arc-shaped slot is arranged on the rack for sliding of the limiting column, and a micro switch is arranged at each end of the arc-shaped slot.
[0020] By adopting the above technical scheme, the maximum rotation angle of the main shaft is limited.
[0021] In summary, the present application has at least one of the following beneficial technical effects:
[0022] 1. When electrically driven, the output shaft of the driving motor transmits torque to the driving shaft through the reduction gear set, and then the clutching assembly transmits the torque on the driving shaft to the main shaft, thereby realizing the process of driving the main shaft to rotate by the driving motor. When manually driven, the operator rotates the main shaft, and since the clutching assembly can only transmit the torque on the reduction gear set to the main shaft in one direction, the rotation of the main shaft is not affected by the reduction gear set, thereby achieving the effect of saving effort.
[0023] 2. When the driving gear drives the driving shaft to rotate, the driving shaft drives the driving block to rotate synchronously, the rotating driving block pushes the ball, the ball rolls in the rolling groove in the direction away from the driving shaft until the driving block presses the ball against the inner side wall of the outer ring, with the driving shaft continuing to rotate, the inner ring drives the ball to abut against the clutch block on the outer ring, under the blocking action of the clutch block, the outer ring rotates with the inner ring, and then the transmission member transmits the torque on the outer ring to the main shaft;
[0024] 3. When the main shaft needs to be manually rotated, the driving motor reverses a certain angle first, at this time, the rolling groove is located between the adjacent two driving blocks through the speed reduction gear set, then the operator rotates the main shaft, the main shaft drives the outer ring to rotate through the transmission member, the clutch block on the outer ring pushes the ball to the position between the rolling groove and the adjacent two driving blocks, and the outer ring can rotate freely, and the driving shaft does not rotate with the outer ring, so that the effect of saving effort is achieved. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 is a structural schematic diagram of an embodiment of the application.
[0026] Figure 2 is a structural schematic diagram of an embodiment of the application for reflecting the positional relationship of the transmission gear, the mounting column and the main shaft.
[0027] Figure 3 is a structural schematic diagram of an embodiment of the application for reflecting the positional relationship of the inner ring, the outer ring and the driving shaft.
[0028] BRIEF DESCRIPTION OF DRAWINGS 1. rack; 2. driving motor; 3. main shaft; 4. driving shaft; 5. speed reduction gear set; 51. driving gear; 52. worm wheel; 53. worm; 54. speed reduction gear; 6. clutch assembly; 61. inner ring; 62. outer ring; 63. transmission member; 631. mounting column; 632. driving gear; 633. transmission gear; 64. clutch block; 65. driving block; 66. rolling groove; 67. ball; 7. ring groove; 8. damping clamp; 9. support column; 10. limiting column; 11. arc-shaped groove; 12. micro switch. DETAILED DESCRIPTION
[0029] The following will be described in detail in combination with the accompanying Figures 1-3 The application is further described in detail.
[0030] An operating mechanism is disclosed in the embodiments of the application.
[0031] Reference will be made to Figure 1The operating mechanism comprises a rack 1, a driving motor 2 bolted on the rack 1, a main shaft 3 and a driving shaft 4 rotationally connected on the rack 1, a speed reduction gear set 5 arranged between the output shaft of the driving motor 2 and the driving shaft 4 for transmitting torque, and a clutch assembly 6 arranged between the main shaft 3 and the driving shaft 4 for unidirectionally transmitting the torque on the speed reduction gear set 5 to the main shaft 3.
[0032] With reference to Figure 1 , Figure 2 and Figure 3 , the speed reduction gear set 5 comprises a driving gear 51 coaxially welded on the driving shaft 4 and a worm wheel 52 rotationally connected on the rack 1, a worm 53 coaxially welded on the output shaft of the driving motor 2 and engaged with the worm wheel 52, and a plurality of speed reduction gears 54 rotationally connected between the driving gear 51 and the worm wheel 52 for transmitting torque.
[0033] With reference to Figure 2 and Figure 3 , the clutch assembly 6 comprises an inner ring 61 coaxially rotationally sleeved on the driving shaft 4, an outer ring 62 coaxially rotationally sleeved on the inner ring 61, a ring groove 7 coaxially formed on the circumferential outer side wall of the inner ring 61, a damping clamp 8 with a U-shaped cross section clamped on the ring groove 7, a support column 9 bolted on the rack 1 and located between the two ends of the U-shaped damping clamp 8, and the damping clamp 8 used for abutting against the support column 9.
[0034] With reference to Figure 3 , a plurality of clutch protrusions 64 are uniformly welded on the inner side wall of the outer ring 62, the clutch protrusions 64 can also be arranged in an integral molding manner with the outer ring 62, the clutch protrusions 64 abut against the circumferential outer side wall of the inner ring 61, a plurality of driving protrusions 65 are uniformly welded on the circumferential outer side wall of the driving shaft 4, the driving protrusions 65 can also be arranged in an integral molding manner with the driving shaft 4, and the driving protrusions 65 abut against the circumferential inner side wall of the inner ring 61.
[0035] With reference to Figure 3 , a rolling groove 66 is formed between the inner and outer side walls of the inner ring 61 and in the radial direction of the axis of the inner ring 61, and a rolling ball 67 is arranged to roll in the rolling groove 66, the distance between the circumferential outer side wall of the driving shaft 4 and the circumferential outer side wall of the inner ring 61 is greater than the diameter of the rolling ball 67, and the ring diameter of the inner ring 61 is smaller than the diameter of the rolling ball 67, when the driving protrusions 65 abut against the rolling ball 67 and remain relatively stationary, at this time, the rolling ball 67 abuts against the inner side wall of the outer ring 62.
[0036] With reference to Figure 2 and Figure 3 , a transmission member 63 for transmitting torque is arranged between the outer ring 62 and the main shaft 3, the transmission member 63 comprises an installation insertion column 631 coaxially inserted into the inner ring of the outer ring 62, and a driving gear 632 coaxial with the outer ring 62 is welded on the installation insertion column 631.
[0037] Referring to Figure 1 and Figure 2 The main shaft 3 is welded with a transmission gear 633 which is in mesh with the driving gear 632, and the transmission gear 633 is welded with a limiting column 10 which is parallel to the axis of the main shaft 3. The frame 1 is provided with an arc-shaped slot 11 for the sliding of the limiting column 10, and the arc-shaped both ends of the arc-shaped slot 11 are bolted with micro switches 12.
[0038] When the electric operation is adopted, the output shaft of the driving motor 2 drives the worm 53 to rotate the worm wheel 52, the worm wheel 52 drives the driving gear 51 through a plurality of speed reduction gears 54 to rotate the driving shaft 4 synchronously, the driving shaft 4 drives the driving protrusions 65 to rotate synchronously, and the inner ring 61 is kept stationary under the resistance of the damping clamp 8.
[0039] The rotating driving protrusions 65 push the balls 67, the balls 67 roll in the rolling grooves 66 in the direction away from the driving shaft 4, until the driving protrusions 65 press the balls 67 against the inner side wall of the outer ring 62, and the resistance of the damping clamp 8 is overcome with the continuous rotation of the driving shaft 4, the inner ring 61 drives the balls 67 to abut against the clutching protrusion 64 on the outer ring 62.
[0040] Under the blocking action of the clutching protrusion 64, the outer ring 62 rotates with the inner ring 61, and then the outer ring 62 drives the driving gear 632 to rotate through the mounting plug 631, the driving gear 632 drives the main shaft 3 to rotate through the transmission gear 633, and the limiting column 10 slides in the arc-shaped slot 11 until the limiting column 10 triggers the micro switch 12, at which time the driving motor 2 stops working.
[0041] When the manual rotation of the main shaft 3 is needed, the driving motor 2 is first reversed for 1-2 seconds, and the inner ring 61 is kept stationary due to the resistance of the damping clamp 8, the driving shaft 4 drives the driving protrusions 65 to rotate, so that the rolling grooves 66 at this time are communicated with the adjacent two driving protrusions 65 on the side towards the axis of the driving shaft 4.
[0042] Then the operator rotates the main shaft 3, the main shaft 3 drives the driving gear 632 to rotate through the transmission gear 633, the driving gear 632 drives the outer ring 62 to rotate through the mounting plug 631, and the inner ring 61 is kept stationary due to the resistance of the damping clamp 8, the clutching protrusion 64 on the outer ring 62 pushes the balls 67 to the position between the rolling grooves 66 and the adjacent two driving protrusions 65, at which time the outer ring 62 can rotate freely, and the driving shaft 4 will not rotate.
[0043] The implementation principle of the operation mechanism is as follows: when the electric operation is adopted, the output shaft of the driving motor 2 drives the worm 53 to rotate the worm wheel 52, the worm wheel 52 drives the driving gear 51 to rotate through the plurality of speed reduction gears 54, the driving gear 51 drives the driving shaft 4 to rotate synchronously, the driving shaft 4 drives the driving protrusions 65 to rotate synchronously, and the inner ring 61 remains stationary under the resistance of the damping clamp 8.
[0044] The rotating driving protrusions 65 push the balls 67, the balls 67 roll in the rolling grooves 66 in the direction away from the driving shaft 4, until the driving protrusions 65 press the balls 67 against the inner side wall of the outer ring 62, and with the continuous rotation of the driving shaft 4, the resistance of the damping clamp 8 is overcome, the inner ring 61 drives the balls 67 to abut against the clutch protrusion 64 on the outer ring 62.
[0045] Under the blocking effect of the clutch protrusion 64, the outer ring 62 rotates together with the inner ring 61, and then the outer ring 62 drives the driving gear 632 to rotate through the mounting plug 631, the driving gear 632 drives the main shaft 3 to rotate through the transmission gear 633, and at the same time, the limiting column 10 slides in the arc-shaped groove 11 until the limiting column 10 triggers the micro switch 12, at which time the driving motor 2 stops working.
[0046] When the main shaft 3 needs to be manually rotated, the driving motor 2 is first reversed for 1-2 seconds, and due to the resistance effect of the damping clamp 8, the inner ring 61 remains stationary, and the driving shaft 4 drives the driving protrusions 65 to rotate, so that the rolling grooves 66 at this time are connected to the adjacent two driving protrusions 65 on the side towards the axis of the driving shaft 4.
[0047] Then the operator rotates the main shaft 3, the main shaft 3 drives the driving gear 632 to rotate through the transmission gear 633, the driving gear 632 drives the outer ring 62 to rotate through the mounting plug 631, and due to the resistance effect of the damping clamp 8, the inner ring 61 remains stationary, the clutch protrusion 64 on the outer ring 62 pushes the balls 67 to the position between the rolling grooves 66 and the adjacent two driving protrusions 65, at which time the outer ring 62 can be freely rotated, and the driving shaft 4 will not rotate.
[0048] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.
Claims
1. An operating mechanism characterized by: The application relates to a driving mechanism for a machine frame (1) provided with a driving motor (2), a main shaft (3) and a driving shaft (4) rotatably arranged on the machine frame (1), a reduction gear set (5) arranged between the output shaft of the driving motor (2) and the driving shaft (4) for transmitting torque, and a clutch assembly (6) arranged between the main shaft (3) and the driving shaft (4) for transmitting torque from the reduction gear set (5) to the main shaft (3) in one direction.
2. An operating mechanism according to claim 1, characterised in that: The reduction gear set (5) comprises a driving gear (51) coaxially arranged on the driving shaft (4) and a worm wheel (52) rotatably arranged on the machine frame (1), a worm (53) coaxially arranged on the output shaft of the driving motor (2) and meshing with the worm wheel (52), and a plurality of reduction gears (54) rotatably arranged between the driving gear (51) and the worm wheel (52) for transmitting torque.
3. An operating mechanism according to claim 2, wherein: The clutch assembly (6) comprises an inner ring (61) coaxially and rotatably sleeved on the driving shaft (4), an outer ring (62) coaxially and rotatably sleeved on the inner ring (61), a transmission member (63) arranged between the outer ring (62) and the main shaft (3) for transmitting torque, a plurality of clutch protrusions (64) uniformly arranged on the inner side wall of the outer ring (62) and abutting against the circumferential outer side wall of the inner ring (61), a plurality of driving protrusions (65) uniformly arranged on the circumferential outer side wall of the driving shaft (4) and abutting against the circumferential inner side wall of the inner ring (61), and a rolling groove (66) formed between the inner and outer side walls of the inner ring (61) and in which a rolling ball (67) is arranged, wherein the rolling ball (67) abuts against the inner side wall of the outer ring (62) when the driving protrusion (65) abuts against the rolling ball (67).
4. An operating mechanism according to claim 3, wherein: The distance between the circumferential outer side wall of the driving shaft (4) and the circumferential outer side wall of the inner ring (61) is greater than the diameter of the rolling ball (67), and the diameter of the inner ring (61) is smaller than the diameter of the rolling ball (67).
5. An operating mechanism according to claim 3, wherein: The transmission member (63) comprises a mounting plug (631) coaxially inserted into the inner ring of the outer ring (62), the mounting plug (631) is provided with a driving gear (632) coaxial with the outer ring (62), and the main shaft (3) is provided with a transmission gear (633) meshing with the driving gear (632).
6. An operating mechanism according to claim 3, wherein: The inner ring (61) is coaxially provided with a ring groove (7), the ring groove (7) is provided with a damping clamp (8) with a U-shaped cross section, the machine frame (1) is provided with a support column (9) between the two ends of the U-shaped damping clamp (8), and the damping clamp (8) is used for abutting against the support column (9).
7. An operating mechanism according to claim 5, wherein: The transmission gear (633) is provided with a limiting column (10), the axis of the limiting column (10) is parallel with the axis of the main shaft (3), the machine frame (1) is provided with an arc-shaped slot (11) for the sliding of the limiting column (10), and the arc-shaped both ends of the arc-shaped slot (11) are provided with micro switches (12).